Method of printing and giving a parchmentized effect to paper



' Patented Mar. 24; 1925.

' 1,531,231 PATENT OFFICE- EDWIN I4. BBAUN, OF ZION, ILLINOIS, ASSIGNOR, BY HESNE ASSIGNMENTS, TO GREAT Amman ABT MANUFACTURING COMPANY, OF WILMINGTON, DELAWARE, A

CORPORATION OF iDELAWABE.

METHOD OF PRINTING AND GIVING A PARGHIENTIZED EFFECT T0 PAPER.

1T0 Drawing. Application filed July 23, 1920, Serial No. 398,550. Renewed July 28, 1924.

To all whom it may concern: Be it known that I, EDWIN L. BBAUN, a citizen of the United States, and a resident of Zion, in the county of Lake and State-0f 5 Illinois, have invented certain new and useful Improvements in Methods of Printing and .Giving. a Parchmentized Effect to Paper, of which the following is a specification.

This invention relates generally to methods of printing and giving-a parchmentized effect to paper and particularly printing by the use of the multi-colorphotolithographic ofiset printing process.

The particular use or adoption of the present invention is exemplified with regard to the so-called parchment lamp shades.

These lamp shades have heretofore been manufactured from what is known as parchmentized paper and then hand colored. or painted with "designs, pictures, and the like. As a result of this hand work quantity production is impractical and the expense of the shades is large. Owing to the nature of the parchmentized paper, it is impractical to use any printing process thereon either for letters, characters, designs or paintings, and the hand coloring or painting has been deemed essential.

In connection with the manufacture of these hand painted or colored lam shades, it hasbeen the custom to first pare mentize the paper and then place the design thereon by hand. The object of the present method is to print the design on the selected paper in the well-known standard way with very I few modifications or changes, and then subsequently treat the paper to produce the translucenc and the parchmentized efiect.

In carr ing out the present invention a design is aid out in any suitable manner by p hand or otherwise and as most of the designs used on lamp shades are colored pictures, and the like, an oil or water-color painting may be selected as the design for the shade after which photographic separations by the three color method of photography are made, thus producing three negatives, one for red, one .for yellow and one for blue.

From these'negatiyes a number of positives are made,.one positive being made for each color it is intendedto. embody in the reproduced painting. Heretofore these positives have usually been made on plain or smooth glass, but in carrying out the present invention it is preferable to use ground glass because of the ease with which it can be retouched.

After the positives are made as aforesaid they are retouched by-a lithographic artist for com lete and accuratecorrection in the color va ues. i Subsequent to the retouching of the positives a half tone negative is made from each ground glass positive, said negatives being suitable for making hoto-lithographic plates to be used on the 0 set press. It will I be observed that one half tone negative is used for each color.

- These half tone negatives are then used for the production of prints by the albumen process on grained zinc plates, one plate being provided for each color used'in repro ducing the painting.

Lithographic transfers are then made from these zinc plates in the usual manner on large plates of grained zinc which are then put .on the offset press.

After lithographic transfers have been made the printing is done in the usual manner on paper suitable for offset printing and capable of holding its shape whenbent into various forms. This printing reproduces the colors of the original painting on the paper, which is not at this point parchmentized.

Up to this point the process is the standard multi-color, photo-lithographic off-set printing process and differs from that now 1n common use and practice and well-known in the arts in that ground glass is used tomake the ositives from t e three color photographlc separations in lieu of the lain glass heretofore used.

After the design has been printed as aforesaid upon the paper the present invention is designed to give the parchment effect to the paper. This is accomplished by rubbing the back of the paper so printed with a soft rag saturated with a solution consisting of the following:

albolene, commonly known as paraffin oil.

% oil of white rose.

This solution is so rubbed upon the back .of the print with the soft rag as described,

that it will completely saturate through the deposit of the gum damar on the printed surface of the paper, and also to some extent in the body of the paper. This treatment of the paper after it has been printed creates the parchmentized effect and translucency.

What is claimed is:

L'The method of treating printed paper consisting of impregnating the paper with an oily liquid and then varnishing the same while still soft with the oily liquid.

2. The method of treating printed paper consisting of impregnating the paper from the unprinted surface thereof with an oily liquid and varnishing the printed surface thereof while still soft with the oily liquid.

3. The method of treating paper consistingin saturating the paper with a solution consisting of albolene and oil of white rose.

4. The method of treating paper consisting in applying thereto an oily solution of albolene and oil of white rose and then varnislhing the paper with a transparent varn1s 5. The method of treating paper consisting in applying a solution of albolene and oil of white rose to one side thereof and a varnish to the other side thereof consisting of gum damar dissolved in xylol;

The method of treating printed paper consisting in applying a solution of albolene and oil of white rose to one side thereof and applying a varnish consisting of gum damar dissolved in xylol to the other side.

7. The method of treating printed paper consisting in applying a solution of albolene and oil of white rose to the unprinted side thereof and appl ing a varnish consisting of gum damar issolved in xylol to the printed side thereof.

EDWIN L. BRAUN. 

